A simple perylene diimide derivative with a highly twisted geometry as an electron acceptor for efficient organic solar cells

被引：110
作者：
Li, Shuixing [1 ]
Liu, Wenqing [1 ]
Li, Chang-Zhi [1 ]
Liu, Feng [2 ,3 ]
Zhang, Yingzhu [1 ]
Shi, Minmin [1 ]
Chen, Hongzheng [1 ]
Russell, Thomas P. [4 ]
机构：
[1] Zhejiang Univ, MOE Key Lab Macromol Synth & Functionalizat, State Key Lab Silicon Mat, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
[2] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
[3] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA
[4] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2016年 / 4卷 / 27期
基金：
以色列科学基金会; 中国国家自然科学基金;
关键词：
NON-FULLERENE-ACCEPTOR; POWER CONVERSION EFFICIENCY; SMALL-MOLECULE ACCEPTOR; POLYMER; PERFORMANCE; PHOTOVOLTAICS; DONOR; SEMICONDUCTORS; CHAINS;
D O I：
10.1039/c6ta04232e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Perylene diimide (PDI), which features intense absorption, a low-lying energy level, and high electron mobility, is a promising building block for electron acceptors in organic solar cells (OSCs). However, this planar molecule has a strong tendency to form large aggregates during film formation which strongly limits its OSC performance. Herein, we report a new and simple PDI derivative, B(PDI)(3), in which a central benzene unit is employed to connect three PDI arms. This compact arrangement of sterically bulky PDI moieties leads to a twisted molecular geometry of the resultant structure. This suppresses the strong crystallization tendency of PDI chromophores, owing to the broken molecular coplanarity and symmetry. Therefore, B(PDI) 3 is applied as a non-fullerene acceptor in OSCs, providing a good power conversion efficiency of 5.65% when blended with the PTB7-Th donor.
引用
收藏
页码：10659 / 10665
页数：7
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